3647306

Information

• Patent Grant
• 3647306

• References
• Source

• Patent Number

  3,647,306

• Date Filed

  Not available

• Date Issued

  Tuesday, March 7, 1972
  52 years ago

• CPC

  • B42F13/28 - in two staggered sections

• US Classifications

  • 402 - Binder device releasably engaging aperture or notch of sheet
  • 411 - Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener